ISP1362
Single-chip USB OTG controller
Philips Semiconductors
8. Functional description
8.1 On-The-Go (OTG) controller
The OTG Controller provides all the control, monitoring and switching functions
required in OTG operations.
8.2 Advanced Philips Slave Host Controller (PSHC)
The advanced Philips Slave HC is designed for highly optimized USB host
functionality. Many advanced features are integrated to fully utilize the USB
bandwidth. A number of tasks are performed at the hardware level. This reduces the
requirement on the microprocessor and thus speeds up the system.
8.3 Philips Device Controller (DC)
The Philips DC is a high performance USB device with up to 14 programmable
endpoints. These endpoints can be configured as double-buffered endpoints to
further enhance the throughput.
8.4 Phase-Locked Loop (PLL) clock multiplier
A 12 MHz-to-48 MHz clock multiplier PLL is integrated on-chip. This allows the use of
a low-cost 12 MHz crystal that also minimizes Electro-Magnetic Interference (EMI)
because of low frequency. No external components are required for the operation of
PLL.
8.5 USB and OTG transceivers
The integrated transceivers (for typical downstream port) directly interface to the USB
connectors (type A) and cables through some termination resistors. The transceiver
is compliant with Universal Serial Bus Specification Rev 2.0.
8.6 Overcurrent protection
The ISP1362 has a built-in overcurrent protection circuitry. This feature monitors the
current drawn on the downstream VBUS and switches off VBUS when the current
exceeds the current threshold. The built-in overcurrent protection feature can be used
when the port acts as a host port.
8.7 Bus interface
The bus interface connects the microprocessor to the USB host and the USB device
allowing fast and easy access to both.
8.8 DC and HC buffer memory
4096 bytes (host) and 2462 bytes (device) of built-in memory provide sufficient space
for the buffering of USB traffic. Memory in the HC is addressable by using the fast and
versatile direct addressing method.
9397 750 12337
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
Product data
Rev. 03 — 06 January 2004
13 of 150
NXP [ NXP ]
